Telephone set



Nov. 21, 1933.

H. F. OBERGFELL TELEPHONE SET 2 Sheets-Sheet 1 Filed Nov. 2, 1931 Inuenlclr' Herb 2?? F Ulnar 1211 Eng.

Nov. 21, 193 H. F. OBERGFELL TELEPHONE SET Filed Nov. 2, 1951 2 Sheets-Sheet 2 Inuan m- HEFE'E FT F Ulnar all Patented Nov. 21, 1933 V TELEPHONE SET Herbert F. Obergfell, River Forest, 111., assignor to Associated Electric Laboratories,

Inc.,

Chicago, 111., a corporation of Delaware Application November 2, 1931. Serial No. 572,460

4 Claims. (01. 179 100) The -present invention relates in general to telephone sets, but isparticularly concerned with the provision of a set which may be very economically manufactured and which is readily acces- 5' sible to the maintenance force of an operating company. This is in the main made possible by securing the calling dial of the instrument to the base, instead of securing it to the cover portion as. has heretofore been the practice.

The invention is illustrated in two sheets of drawings comprising Figs. 1 and 2, respectively.

Fig. 1 is a front view of the set with the cover removed and with the calling-dial indicated by interrupted lines, so that the parts thereunder may be readily seen.

Fig. 2 is a side view of the set with certain portions shown in section.

The base and cover portions 1 and 41 are made of insulating material, such as bakelite, for example. The base portion 1 has a groove 2 substantially surrounding it into which a tongue 3, substantially surrounding the cover portion 41, tightly fits when the cover and base portions are as sembled. n 1 In the upper portion of the base 1 cradle ex tensions 4 and 5 are formed. Immediately below, these, shelves 9 and 10 are formed for supporting the cradle spring assembly 7 and its cover 8, which are held in place in the manner'illustrated in the Obergfell Patent No. 1,738,919, which issued December 10, 1929.

In the lower central portion of the base, a bracket 11 is secured in place by screws 12 and 13. Through the medium of screws 18 and 19 the ringer coil and armature assembly 20 is held.

in place on this bracket. The permanent magnet of the ringer is also held on this bracket by a U shaped clip 21'. The gongs 16 and 1'7 of the ringer are also mounted on the bracket through i the medium of posts 14 and 15. These posts have reduced threaded portions, as illustrated in Fig.

2, which receive the gongs, which are, in turn,

held in the desired adjustment by the elongated hexagon headed nuts 14' and 15, respectively.

The calling device 25 is also secured to the bracket 11 through the medium of extensions 22 and 23 thereof having the blocks 24 and'25' riveted thereto. A pair of posts 26 threaded into the calling device base slide .into the holes in the, blocks 24 and 25', and the calling device is then.

looked in place by tightening up the screws 2'7 and 28, threadedinto these blocks.

In the base portion 1, immediately below the gongs l6 and 17, metallic inserts are moulded 55, and these are provided with screws 31, 32, and

33, which serve as line and ground terminals, respectively. As illustrated in Fig. 2, it will be observed that these terminals extend outside of the base, thereby enabling connections to be made to the set without requiring the bringing of the no" lead-in wires into the box itself.

Immediately below the screws 31, 32, and 33, a depressed portion of the base 1 provides a space for the condenser 36, adjacent which is located the induction coil 37. The condenser and induc- 5 tion coil are held in place by screws 38 and 39 which passthrough the spool heads of the induction coil and. are threaded into appropriate inserts in the base portion 1.

When the foregoing apparatus is installed on 1 the base portion 1, all necessary wiring between the various elements may be done and the usual hand telephone cord properly connected up through the medium of the various terminals on the spool heads of the induction coil.

After the line and ground lead-in wires have been connected with the terminals on the rear of the base, the same may be mounted upon any vertical surface by use of screws passing through holes in the base provided for this purpose.

The cover portion 41 of the assembly, which has the two front posts 6 of the cradle portion of the set formed therein, may now be properly positioned with respect to the base, and is held in place by screws passing through the cover and threaded into the openings 29 and 30 of the previously described bracket 11. The calling dial, although fixed to the base of the set, protrudes through an appropriate opening in the cover and the set is now completely assembled and installed and ready for service. Obviously, since none of the apparatus of the set is in any way supported by the cover portion 41, this cover may be removed at any time without disturbing any of the apparatus. An inspection of the apparatus may, therefore, very readily be made without in any way disturbing the apparatus or wiring of the set.

What is claimed is:

1. In a telephone set of the cradle type, a 100. ringer box comprising a moulded base portion which includes the base and one pair of upwardly extending cradle elements, and. comprising a moulded cover portion which includes the other pair of upwardly extending cradle elements.

2. In a telephone set of the cradle type, a ringer box comprising a moulded base portion which includes the ends, one side and two of the upwardly extending elements of the cradle assembly, and a cover portion which includes the moulded base portion, switchhook springs and a 7 calling device supported on the base portion, said base portion having a part forming a part of the cradle element, a cover portion for covering the base including the remaining parts of the cradle portion, said cover and base when secured together forming a complete cradle support for a hand telephone. I I i x HERBERT F; OBEBGP'ELL. 

